Editing a source citation to include a repository

Editing a source citation to include a repository

Hello, I have two simple questions, but can't seem to find an answer in help which pertains to FTMM2.1. How do I edit a source citation to include a repository? On a source citation now I get the error, "No repository is specified for this source" and the repository is greyed out. I need some step by step directions, for the most current Mac version of FTMM2, please.2. What is the appropriate way to cite a WWW repository, for example, is Ancestry.com, "Ancestry.com" or www.Ancestry.com? I think records imported from Ancestry.com into the FTMM2 tree use the www designation first and I want to follow suit with other WWW based records.